CN100485415C - Method for measuring well by azimuth reflective sound wave - Google Patents
Method for measuring well by azimuth reflective sound wave Download PDFInfo
- Publication number
- CN100485415C CN100485415C CNB2006101442438A CN200610144243A CN100485415C CN 100485415 C CN100485415 C CN 100485415C CN B2006101442438 A CNB2006101442438 A CN B2006101442438A CN 200610144243 A CN200610144243 A CN 200610144243A CN 100485415 C CN100485415 C CN 100485415C
- Authority
- CN
- China
- Prior art keywords
- well
- receiving transducer
- stratum
- transmitting probe
- array element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A method of using position reflection acoustic wave to test well placing radiator and receiving probe in liquid packed well hole to be tested, radiating sound wave to certain side well wall by radiator with changed array element, making well side media in position angle range joint vibration and well side media out of position angle range not joint vibration, carrying out scanning measurement on well ground layer in said range, receiving reflection acoustic wave signal containing only certain side of well side media information by various probes, processing received signal and obtaining acoustic evaluation of well side ground layer in position angle range.
Description
Technical field
The invention belongs to the applied geophysics field, relate to a kind of logging method, particularly a kind of method for logging bearing reflective sound wave.
Background technology
At present, the difficulty of petroleum prospecting, exploitation is increasing, presses for the hydrocarbon-bearing pool regularity of distribution and Remaining Oil Distribution in the bad grounds such as understanding low hole, hypotonic, heterogeneous body, anisotropy, must explore new measuring method.Because the resolution of 3-d seismic exploration and crosshole seismic exploration is on the low side, is not easy near the little geologic structure of appraisal well eye and instructs inclination drilling.The reflective sound wave well logging mainly comprises well logging of reflection supersonic wave Pulse Imageing and the detection borehole acoustic reflection imaging of researching and developing far away.Reflection supersonic wave Pulse Imageing well logging is mainly used in to the imaging of borehole wall dielectric surface with to cementing quality to be estimated, its radially investigative range be no more than 10cm.The resolution (tens centimetres) of the detection borehole acoustic reflection imaging far away that is rising both at home and abroad and measurement range (several meters to tens meters) be between routinely between seismic exploration and the conventional acoustic logging method, thereby help to fill up above-mentioned two kinds of blank that measuring method stays.Reflective sound wave well logging occupies the important use status in long horizontal traverse well and horizontal well evaluation, can be used for determining that the situation, reservoir interface near stratum (as the oil reservoir cap rock) wellbore are with respect to the thickness of the position of well, reservoir and describe the situation of some little structures (as the crack).At present, the detection borehole acoustic reflection imaging instrument of developing both at home and abroad far away does not have circumferentially (being the orientation) resolution characteristic, utilize this acoustic logging instrument might appraisal well by crack or stratum bedding apart from the distance of borehole axis and inclination angle but can't determine their position angle (promptly can't know their which sides) at the borehole wall.
Summary of the invention
The object of the present invention is to provide a kind of method for logging bearing reflective sound wave, overcome the defective that exists in the above-mentioned prior art, make it have circumferentially (being the orientation) resolution characteristic.
To achieve these goals, the invention provides a kind of method for logging bearing reflective sound wave, its sonic system that is used to log well includes transmitting probe and at least one receiving transducer, and this transmitting probe is phased combination circular array sound radiator, and this receiving transducer is a monopole sound wave receiving transducer; This logging method comprises step:
A. transmitting probe and at least one receiving transducer are arranged in the wellhole to be measured;
B. change the array element combination of the phased combination circular array sound radiator of participation work, and apply suitable delay excitation to realize that the down-hole sound source is to a certain side borehole wall radiative acoustic wave;
C. the sound wave that makes above-mentioned radiation is to be incident in a certain side borehole wall medium less than first critical angle and along a certain position angle, make the other medium of well in this azimuth coverage participate in vibration, and the outer other medium of well of this azimuth coverage does not participate in vibration, and the acoustic signals that enters the stratum is reflected back toward in the well when running into the other bed boundary of well;
D. adopt short space and long space working method that scanning survey is carried out on the other stratum of the well in this azimuth coverage respectively;
E. each receiving transducer receives the acoustic signals of the different spacings in the above-mentioned azimuth coverage, makes it only comprise the information of the other medium of a certain side well relevant with travel path;
F. the multiple tracks received signal of the different spacings that obtain in the above-mentioned steps is handled, obtained the acoustic assessment on the other stratum of well in this azimuth coverage.
Preferably, the array number of the phased combination circular array sound radiator of described participation work is greater than 1, and its symmetrical relatively array element coordination vibrates mutually.
Preferably, the excitation that applies between the array element of the phased combination circular array sound radiator of described participation work postpones:
R(cosα
1—cosα
n)/c
Wherein, R-phased combination circular array sound radiator radius;
Rcos α
1The projection of line on the radiation direction central shaft of-one vibration array element and radiation center;
Rcos α
nThe projection of line on the radiation direction central shaft of-another vibration array element and radiation center;
C-velocity of sound;
α
1The angle of-one array element and radiation direction central shaft;
α
nThe angle of-another array element and radiation direction central shaft.
Preferably, described short space working method is the working method that spacing between described transmitting probe and the receiving transducer is measured during less than 1m.
Preferably, described long space working method is the working method that spacing between described transmitting probe and the receiving transducer is measured during greater than 2m.
Preferably, described at least one receiving transducer is arranged in the one or both sides of described transmitting probe.
Preferably, the acoustic measurement frequency range of described transmitting probe radiation is 6kHz～20kHz.
Preferably, described sonic system in wellhole in the process of rising or falling at different depth point repeating step A to E, scanning survey is carried out on the other stratum of well.
Preferably, described transmitting probe and at least one receiving transducer are arranged on the borehole axis of wellhole to be measured.
Preferably, change described position angle,, obtain the acoustic assessment on the other stratum of whole circumference well the other stratum repeating step B to E of the well of different azimuth angular direction.
The advantage that the present invention has:
1, the sound wave of phased combination circular array sound radiator of the present invention institute's radiation in liquid-filled well bore can and enter the stratum with the interface that is incident in liquid and the borehole wall in the well less than first critical angle and along a certain position angle, the pulsed sound signal that penetrates the stratum runs into this side bed boundary or bedding, be reflected back toward during acoustic impedance non-continuous faces such as crack in the well and and receive by an above monopole sound wave receiving transducer of diverse location, the information that only contains the other bed boundary of this side well in the received signal, by just can obtaining the distance and bearing information of the acoustic interface in the other stratum of this side well to the processing of the multiple tracks received signal of different spacings, thereby realize specifying the acoustic assessment of near-borehole formation in the azimuth coverage.
2, phased combination circular array sound radiator of the present invention can be to the other a certain azimuth direction directed radiation acoustic wave energy of well, make acoustic wave energy to be incident in the borehole wall by control acoustic beam angular width, can fundamentally increase acoustic wave energy, the increase detection range that enters the stratum like this and improve signal to noise ratio (S/N ratio) less than first critical angle.Adopt phased combination circular array control technology, the pulsed sound that transmitting probe is sent enters a certain side borehole wall stratum, the sound wave that enters this side stratum is reflected back toward in the well and by an above monopole sound wave receiving transducer of diverse location when running into bed boundary or bedding and receives, the information that only contains the other formation properties of this side well in the received signal, just can calculate the distance and bearing of the other stratum of this side well acoustic interface by processing, thereby realize specifying the acoustic assessment of near-borehole formation in the azimuth coverage to the multiple tracks received signal of different spacings.
3, the reflective sound wave well logging that azimuthal resolution arranged in well has free from flaw, bedding in not only can the other stratum of appraisal well and from the distance of borehole axis, can also measure its position angle, engineerings such as this formation evaluation for horizontal well, long horizontal traverse well, the other formation fracture of well and interface rating, inclination drilling, oriented perforating are significant.
Above-mentioned and additional features, advantage of the present invention can further be understood by the detailed description below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the process flow diagram of method for logging bearing reflective sound wave of the present invention;
Fig. 2 is phased combination circular array sound radiator synoptic diagram;
Fig. 3 is bearing reflective sound wave well logging sonic system synoptic diagram;
Fig. 4 is short space bearing reflective sound wave well logging synoptic diagram;
Fig. 5 is phased circular array sound radiator acoustic irradiation direction control synoptic diagram.
Description of reference numerals: transmitting probe 1; Receiving transducer 2.
Embodiment
Extremely shown in Figure 5 as Fig. 1, the invention provides a kind of method for logging bearing reflective sound wave, its sonic system that is used to log well includes transmitting probe 1 and at least one receiving transducer 2, as shown in Figure 2, this transmitting probe 1 adopts is that the patent No. is the phased combination circular array sound radiator described in the patent of invention of ZL 20,031,011 5236.1, this receiving transducer 2 is a monopole sound wave receiving transducer, as shown in Figure 3 and Figure 4, described at least one receiving transducer 2 can be the one or both sides that are arranged in described transmitting probe 1, preferably, described transmitting probe 1 and at least one receiving transducer 2 can be arranged on the borehole axis of wellhole to be measured; As shown in Figure 1, this logging method comprises step:
A. transmitting probe 1 and at least one receiving transducer 2 are arranged in the wellhole to be measured;
B. change the array element combination of the phased combination circular array sound radiator of participation work, and apply suitable delay excitation to realize that the down-hole sound source is to a certain side borehole wall radiative acoustic wave;
C. the sound wave that makes above-mentioned radiation is to be incident in the other medium of a certain side well less than first critical angle and along a certain position angle, make the other medium of well in this azimuth coverage participate in vibration, and the outer borehole wall medium of this azimuth coverage does not participate in vibration, and the acoustic signals that enters the stratum is reflected back toward in the well when running into the other bed boundary of well;
D. adopt short space and long space working method that scanning survey is carried out on the other stratum of the well in this azimuth coverage respectively;
E. each receiving transducer 2 receives the reflective sound wave signal of the different spacings in the above-mentioned azimuth coverage, makes it only comprise the information of the other medium of a certain side well relevant with travel path;
F. the multiple tracks received signal of the different spacings that obtain in the above-mentioned steps is handled, obtained the acoustic assessment on the other stratum of well in this azimuth coverage.
The array number of the phased combination circular array sound radiator of described participation work both can be an even number greater than 1, also can be odd number, and its symmetrical relatively array element coordination vibrates mutually.
As shown in Figure 5, utilize phased combination circular array sound radiator to realize the azimuth scan radiative acoustic wave for convenience of explanation, we are that R, 24 array element circular array are that example describes with the radius.In certain is once measured, only finish a certain infrasonic wave radiation (other array element is not worked) on the circular array, and be provided with and vibrate mutually with No. 6 array element coordinatioies for No. 1, vibrate mutually with No. 5 array element coordinatioies for No. 2, vibrate mutually with No. 4 array element coordinatioies for No. 3 by 1～No. 6 array element work.4, the initial moment of the excitation of 5, No. 6 array elements is used t respectively
1, t
2And t
3Expression, and get:
Wherein, R-phased combination circular array sound radiator radius;
Rcos α
1The projection of line on the radiation direction central shaft of-one vibration array element and radiation center;
Rcos α
nThe projection of line on the radiation direction central shaft of (n=2,3)-another vibration array element and radiation center;
C-velocity of sound;
α
1The angle of-one array element and radiation direction central shaft;
α
nThe angle of (n=2,3)-another array element and radiation direction central shaft.
According to phased circular array radiation directivity principle as can be known, the result of these 6 array element collaborative works makes sound wave along the x direction radiation shown in the figure.Similarly, when encouraging work by corresponding time delay, 0～No. 5 array element just can make sound wave when getting along the x shown in the figure
1The direction radiation.If the transmitting probe 1 of the work of participation, the array number of just phased combination circular array sound radiator is an odd number, then the central axis with the array element of centre is a symmetry, the array element of both sides symmetry is carried out coordination and is vibrated mutually, changes the array element combination of participation work successively and apply suitable delay excitation just to realize that the down-hole sound source carries out the azimuth scan radiative acoustic wave to borehole wall circumference.Simultaneously, make acoustic wave energy to be incident in the borehole wall (having announced the control method of " vertical directivity " among the patent ZL 20,031,011 5236.1) less than first critical angle, can fundamentally to increase like this acoustic wave energy, the increase detection range that enters the stratum and to improve signal to noise ratio (S/N ratio) by vertical directivity and the radiation acoustic beam angular width of controlling phased combination circular array.
Method of the present invention is exclusively used in bearing reflective sound wave well logging, and the selection of spacing (sending out the distance of receiving between the probe) is had priority option.Short space working method described in the above-mentioned steps is the working method that spacing between described transmitting probe and the receiving transducer is measured during less than 1m, and described long space working method is the working method that spacing between described transmitting probe and the receiving transducer is measured during greater than 2m.As shown in Figure 4, it is 1 nearer (in the 1m that receiving transducer 2 range transmission are popped one's head in, short space), make one the one internal loopback work of knocking off and approaching a probe of transmitting probe 1 and receiving transducer 2, promptly make the sonic propagation direction that enters the other stratum of well with all be similar to vertical by in the stratum reflected back well by the well and the direction of propagation of the sound wave that is received with borehole axis.The geometric path propagated of reflection wave is less like this, signal attenuation is less.As shown in Figure 3, receiving transducer 2 range transmission probe 1 is far away (more than the 2m, long space), be used to receive along the refracted longitudinal wave of borehole wall medium propagation and the Stoneley wave in refracted shear signal and the well, thus longitudinal and transverse velocity of wave and the decay that involves Stoneley wave in the well that can measure borehole wall stratum; On the other hand, receiving transducer 2 also is used for receiving corresponding to the reflective sound wave non-zero incident angle, that come from the other stratum of well.
As shown in Figure 3, the above-mentioned radiative acoustic wave of azimuth scan each time all makes pulsed sound that transmitting probe sends by entering the stratum in the well and along the other earth-layer propagation of the side well in certain azimuth coverage, and the other stratum media of the well beyond this azimuth coverage and have neither part nor lot in vibration.This sound wave pulse signal is reflected back toward in the well and by an above monopole sound wave receiving transducer of diverse location when running into other bed boundary of this side well or bedding and receives, the information that only contains the other bed boundary of this side well in the received signal, just can calculate the distance and bearing of the other stratum of this side well acoustic interface by processing, thereby realize specifying the acoustic assessment on the other stratum of well in the azimuth coverage to the multiple tracks received signal of different spacings.
In order to obtain the acoustic assessment on the other stratum of whole circumference well, can on the basis of above-mentioned steps, do further to measure, wherein, described sonic system in wellhole in the process of rising or falling at different depth point repeating step A to E, scanning survey is carried out on stratum by the well; Change described position angle,, just can obtain the acoustic assessment on the other stratum of whole circumference well the other stratum repeating step B to E of the well of different azimuth angular direction.
The radiation directivity of phased circular array, the amplitude of acoustic signals are relevant with frequency of sound wave.In order to guarantee that method for logging bearing reflective sound wave proposed by the invention has good azimuth discrimination ability to take into account the signal to noise ratio (S/N ratio) of acoustic signals simultaneously, it is 6kHz～20kHz that the present invention requires the acoustic measurement frequency range.
The processing of described multiple tracks received signal to above-mentioned different spacings, the computing that is meant sound wave time of arrival and amplitude obtains the acoustic information on the other stratum of this side well, just can realize specifying the orientation acoustic assessment of formation properties by the azimuth coverage well by the processing to the multiple tracks received signal of different spacings.This has just repeated no more here for the disposal route that those skilled in the art can know.
Be to be understood that, the above illustrative and nonrestrictive just for the purpose of the present invention of explanation in conjunction with the embodiments, without departing from the spirit and scope of the present invention, can make many changes and modification to the present invention, it all will drop in the scope of the invention defined by the claims.
Claims (1)
1, a kind of method for logging bearing reflective sound wave, it is characterized in that: the sonic system that is used to log well includes transmitting probe and at least one receiving transducer, this transmitting probe is phased combination circular array sound radiator, and this receiving transducer is a monopole sound wave receiving transducer; This logging method comprises step:
A. transmitting probe and at least one receiving transducer are arranged in the liquid-filled well bore to be measured;
B. change the array element combination of the phased combination circular array sound radiator of participation work, and apply suitable delay excitation to realize that the down-hole sound source is to a certain side borehole wall radiative acoustic wave;
C. the sound wave that makes above-mentioned radiation is to be incident in the other medium of a certain side well less than first critical angle and along a certain position angle, make the other medium of well in this azimuth coverage participate in vibration, and the outer borehole wall medium of this azimuth coverage does not participate in vibration, and the acoustic signals that enters the stratum is reflected back toward in the well when running into the other bed boundary of well;
D. adopt short space and long space working method that scanning survey is carried out on the other stratum of the well in this azimuth coverage respectively;
E. each receiving transducer receives the reflective sound wave signal of the different spacings in the above-mentioned azimuth coverage, makes it only comprise the information of the other medium of a certain side well relevant with travel path;
F. the multiple tracks received signal of the different spacings that obtain in the above-mentioned steps is handled, obtained the acoustic assessment on the other stratum of well in this azimuth coverage;
Wherein, the array number of the phased combination circular array sound radiator of described participation work is greater than 1, and its symmetrical relatively array element coordination vibrates mutually;
Wherein, the excitation that applies between the array element of the phased combination circular array sound radiator of described participation work postpones:
R(cosα
1—cosα
n)/c
Wherein, R-phased combination circular array sound radiator radius;
Rcos α
1The projection of line on the radiation direction central shaft of-one vibration array element and radiation center;
Rcos α
nThe projection of line on the radiation direction central shaft of-another vibration array element and radiation center;
C-velocity of sound;
α
1The angle of-one array element and radiation direction central shaft;
α
nThe angle of-another array element and radiation direction central shaft;
Wherein, described short space working method is the working method that spacing between described transmitting probe and the receiving transducer is measured during less than 1m;
Wherein, described long space working method is the working method that spacing between described transmitting probe and the receiving transducer is measured during greater than 2m;
Wherein, described at least one receiving transducer is arranged in the one or both sides of described transmitting probe;
Wherein, the acoustic measurement frequency range of described transmitting probe radiation is 6kHz～20kHz;
Wherein, described sonic system in wellhole in the process of rising or falling at different depth point repeating step A to E, scanning survey is carried out on the other stratum of well;
Wherein, described transmitting probe and at least one receiving transducer are arranged on the borehole axis of wellhole to be measured;
Wherein, change described position angle,, obtain the acoustic assessment on the other stratum of whole circumference well the other stratum repeating step B to E of the well of different azimuth angular direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101442438A CN100485415C (en) | 2006-11-30 | 2006-11-30 | Method for measuring well by azimuth reflective sound wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101442438A CN100485415C (en) | 2006-11-30 | 2006-11-30 | Method for measuring well by azimuth reflective sound wave |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101029936A CN101029936A (en) | 2007-09-05 |
| CN100485415C true CN100485415C (en) | 2009-05-06 |
Family
ID=38715396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101442438A Expired - Fee Related CN100485415C (en) | 2006-11-30 | 2006-11-30 | Method for measuring well by azimuth reflective sound wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100485415C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694153B (en) * | 2009-09-29 | 2012-12-12 | 中国石油大学(北京) | Bed boundary acoustic scan measuring-while-drilling device and method |
| CN102061907B (en) * | 2010-12-09 | 2013-03-06 | 西安威盛电子仪器有限公司 | Flow section scanning imager |
| CN102928347A (en) * | 2012-10-24 | 2013-02-13 | 中达电通股份有限公司 | Detection method for dust on filter screen |
| CN103995286B (en) * | 2014-05-22 | 2016-11-02 | 陕西师范大学 | A kind of acoustic receiver transducer and orientation, down-hole noise leakage detection apparatus and leak hunting method |
| CN104847345A (en) * | 2015-04-20 | 2015-08-19 | 中国海洋石油总公司 | Ultrasonic sensor |
| CN105044779B (en) * | 2015-07-14 | 2017-05-10 | 中国石油天然气集团公司 | Reflecting interface orientation quantitative decision method based on phased receiving directivity and device thereof |
| CN106842327B (en) * | 2016-12-29 | 2019-02-15 | 中国石油天然气股份有限公司 | The method for obtaining the orientation constructed by well |
| CN113685172B (en) * | 2021-09-06 | 2023-06-30 | 中国石油大学(华东) | Method and processing device for evaluating acoustic cementing quality while drilling |
| CN114233275B (en) * | 2021-12-10 | 2023-11-14 | 天津大学 | Well cementation quality evaluation method based on array acoustic logging time difference dispersion curve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4905203A (en) * | 1988-09-30 | 1990-02-27 | Texaco Inc. | Downhole doppler flowmeter |
| CN1448730A (en) * | 2002-10-10 | 2003-10-15 | 大港油田集团有限责任公司 | Echo imaging logging device and logging method |
-
2006
- 2006-11-30 CN CNB2006101442438A patent/CN100485415C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4905203A (en) * | 1988-09-30 | 1990-02-27 | Texaco Inc. | Downhole doppler flowmeter |
| CN1448730A (en) * | 2002-10-10 | 2003-10-15 | 大港油田集团有限责任公司 | Echo imaging logging device and logging method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101029936A (en) | 2007-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100485415C (en) | Method for measuring well by azimuth reflective sound wave | |
| US9103944B2 (en) | System and method for sonic wave measurements using an acoustic beam source | |
| CN101694153B (en) | Bed boundary acoustic scan measuring-while-drilling device and method | |
| US6615949B1 (en) | Acoustic isolator for downhole applications | |
| US5001676A (en) | Acoustic borehole logging | |
| EP2577358B1 (en) | Device and method for generating a collimated beam of acoustic energy in a borehole | |
| US6018496A (en) | Method and apparatus for hydraulic isolation determination | |
| US8547791B2 (en) | Device and method for generating a beam of acoustic energy from a borehole, and applications thereof | |
| CN101042046B (en) | Cased well orientation acoustic logging method | |
| EP2577357B1 (en) | Device and method for generating a collimated beam of acoustic energy in a borehole | |
| CN100485414C (en) | Seismic prospecting method between azimuth borehole | |
| US9772419B2 (en) | Decomposing full-waveform sonic data into propagating waves for characterizing a wellbore and its immediate surroundings | |
| US20090231954A1 (en) | Micro-Annulus Detection Using Lamb Waves | |
| US11808908B2 (en) | Real-time reconfiguration of phased array operation | |
| US4713968A (en) | Method and apparatus for measuring the mechanical anisotropy of a material | |
| CN205036370U (en) | A device for evaluating two interface cement of cased well tie quality | |
| CN105134170A (en) | Method for evaluating cement bond quality of two interfaces of cased well | |
| Haldorsen et al. | Borehole acoustic reflection survey (BARS) using full waveform sonic data | |
| CN101029565B (en) | Method for logging open-hole direction sound wave | |
| EP3819460A1 (en) | Method for evaluating a material on a remote side of a wellbore partition using ultrasonic measurements | |
| CN101270659A (en) | System and method for detecting cased well outside ground layer acoustic impedance incontinuous interface | |
| US4631964A (en) | Shear acoustic energy anisotropy of subsurface formations | |
| US10126454B2 (en) | Method and system for fracture detection using acoustic waves | |
| Klieber et al. | Visualization of leaky ultrasonic Lamb wave experiments in multilayer structures | |
| EP0549419A2 (en) | Method and apparatus for hydraulic isolation determination |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090506 Termination date: 20161130 |